REST API error responses for write errors on PUT.

pkg/rest/handlers.go

@@ -106,6 +106,16 @@ var (
 		Title:  "Invalid TLS Secret",
 		Detail: "",
 	}
+	errPemPermission = ErrorDetails{
+		Type:   "/errors/pems/write/permission",
+		Title:  "Insufficient permission to write PEM file",
+		Detail: "",
+	}
+	errPemWriteErr = ErrorDetails{
+		Type:   "/errors/pems/write/error",
+		Title:  "Error writing PEM file",
+		Detail: "",
+	}
 )
 
 // Problem Details object per RFC7807
@@ -318,6 +328,16 @@ func (h *pemsHndlr) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
 			errPemInvalidSecret, err)
 		return
 	} else if err != nil {
+		if os.IsPermission(err) {
+			h.errorResponse(resp, req, now,
+				http.StatusInternalServerError,
+				errPemPermission, err)
+		} else {
+			h.errorResponse(resp, req, now,
+				http.StatusInternalServerError,
+				errPemWriteErr, err)
+		}
+		return
 	}
 	if !have {
 		status = http.StatusCreated